SKYWARN · Iowa
NWS Johnston DMX
51 counties, 4 radars, one forecaster on the warning desk when it goes bad. This page is what that desk is looking at, plus the nets that feed it.
Nothing active from this office
NWS checked 11:28 PMRadar
NWS RIDGE · base reflectivity · last hour
Deeper look: KDMX interactive ↗ · KDMX at College of DuPage ↗ · KDVN interactive ↗ · KDVN at College of DuPage ↗ - velocity, correlation coefficient and every tilt.
SPC outlook · day 1
categorical
Marginal → Slight → Enhanced → Moderate → High · day 2 ↗ · mesoscale discussions ↗
Reports taken by this office today
0 · SPC preliminaryNo spotter reports logged by DMX so far today (UTC).
Cameras near the office
none listed yetNo cameras listed near Johnston yet. Know one?
Radar tells you what the storm is doing; these tell you what it looks like. Pictures open at their source - ODOT and the Mesonet allow linking, not republishing.
SKYWARN & weather nets for this office
Suggest or fix one →No net is listed for NWS Johnston yet. If you know the repeater and who runs it, suggest it - the state coordinator checks it and it shows up here and on the state hub. Never guess a frequency from memory; a wrong one during a warning is worse than none.
Citizen weather stations nearby
10 reporting within 200 mi · APRS, last 2 h| Station | Temp | Hum | Wind | Gust | Rain 24 h | Pressure | Dist |
|---|---|---|---|---|---|---|---|
| WL7CLI | 61° | 70% | calm | 7 | - | 1019.2 | 16 mi |
| K0WOI | 57° | 82% | calm | 1 | - | 1018.9 | 31 mi |
| K0LFT | 59° | 78% | calm | 3 | - | 1017.8 | 31 mi |
| N0MPM-4 | 63° | 71% | calm | - | - | 1018.8 | 41 mi |
| KF0JCL-13 | 64° | 69% | calm | 2 | - | 988.9 | 94 mi |
| KE0LFX | 64° | 78% | 1 NE | 2 | - | 1024.1 | 96 mi |
| AE0NK | 65° | 76% | calm | - | - | 1020.1 | 102 mi |
| AC0MR | 63° | 74% | 3 NNE | 5 | - | 1019.2 | 102 mi |
| NM5PB | 63° | 71% | 2 WNW | 3 | - | 1019.2 | 103 mi |
| KB0RPJ | 60° | 81% | 3 NNE | 3 | 0.14" | 1019.5 | 124 mi |
Heard on APRS-IS, receive only. These are privately owned stations reporting themselves — treat them as a hint about what the air is doing between the official sites, not as verified observations. Wind and gust are mph. See them on the map →
NOAA Weather Radio in this area
21 transmitters · this office’s first, neighbours after162.500 MHz KJY63 · Forest Citycovers Cerro Gordo, Franklin, Hancock, Kossuth, Winnebago, Worth, Wright · 302 W · NWS Des Moines
162.450 MHz KWN47 · Storm Lakecovers Buena Vista, Cherokee, Ida, Pocahontas, Sac · 301 W · NWS Sioux Falls
162.450 MHz KXI62 · Montezumacovers Iowa (West), Jasper, Keokuk (Northwest), Mahaska, Marion, Poweshiek, Tama (South) · 299 W · NWS Des Moines
162.450 MHz KXI65 · Lenoxcovers Adair, Adams, Ringgold, Taylor, Union (Western 1/2) · 302 W · NWS Des Moines
162.450 MHz KXI68 · St. Ansgarcovers Cerro Gordo, Chickasaw, Floyd, Howard, Mitchell, Worth · 1000 W · NWS La Crosse
162.500 MHz KXI98 · Marshalltowncovers Grundy, Hardin, Jasper, Marshall, Poweshiek, Story, Tama · 300 W · NWS Des Moines
162.425 MHz KZZ37 · Maryvillecovers Page (ALL), Taylor · 1330 W · NWS Kansas City
162.425 MHz KZZ51 · Carrollcovers Audubon, Calhoun, Carroll, Crawford, Greene, Guthrie, Ida, Sac (Southeast), Shelby (Northeast) · 1250 W · NWS Des Moines
162.525 MHz KZZ52 · Hancock/Pottawattamcovers Adair (ALL), Adams, Audubon, Cass, Harrison, Mills, Montgomery, Pottawattamie, Shelby · 750 W · NWS Omaha/Valley
162.475 MHz KZZ68 · Van Wertcovers Clarke, Decatur, Lucas, Ringgold, Union, Wayne · 309 W · NWS Des Moines
162.550 MHz KZZ80 · Milfordcovers Clay, Dickinson, Emmet (WEST), Palo Alto (NW & CENTRAL) · 300 W · NWS Sioux Falls
162.525 MHz WNG666 · Iowa Fallscovers Butler, Franklin, Grundy, Hamilton, Hardin, Wright · 301 W · NWS Des Moines
162.550 MHz WNG668 · Denisoncovers Carroll, Crawford, Ida, Monona, Sac, Shelby · 300 W · NWS Des Moines
162.475 MHz WNG688 · Ringstedcovers Emmet, Hancock, Humboldt, Kossuth, Palo Alto, Winnebago · 301 W · NWS Des Moines
162.500 MHz WNG730 · Ottumwacovers Davis (ALL), Keokuk, Mahaska (ALL), Monroe (ALL), Wapello · 302 W · NWS Des Moines
162.400 MHz WXK84 · Fort Dodgecovers Boone (ALL), Calhoun, Hamilton, Humboldt, Pocahontas, Webster, Wright · 260 W · NWS Des Moines
162.550 MHz WXL57 · Des Moinescovers Adair, Boone, Clarke (North), Dallas, Greene, Guthrie, Jasper, Madison, Marion, Polk, Story, Warren · 1020 W · NWS Des Moines
162.550 MHz WXL94 · Waterloocovers Black Hawk, Bremer, Buchanan, Butler, Chickasaw, Fayette, Floyd, Grundy · 900 W · NWS Des Moines
162.550 MHz WXM36 · Lancastercovers Appanoose (ALL), Davis (ALL) · 300 W · NWS Kansas City
162.400 MHz WXN85 · Fairfieldcovers Davis (NE), Henry, Jefferson, Keokuk (SE), Lee (NW), Van Buren, Wapello (E), Washington (SW) · 300 W · NWS Quad Cities
162.425 MHz WXN91 · Lake Rathbuncovers Appanoose, Davis, Lucas, Monroe, Wapello, Wayne · 301 W · NWS Des Moines
What to report, and where
Size charts and the full guide →🌪️ Tornado, funnel, wall cloud
- ·Tornado on the ground (say if you see debris)
- ·Funnel cloud - rotating, not touching down
- ·Wall cloud, especially a rotating one
- ·Where it is relative to you, and which way it's moving
🧊 Hail
- ·The largest stone, compared to a coin or ball (chart below)
- ·1″ (quarter) is the severe threshold - smaller is still worth a report to most offices
- ·How long it fell and whether it's covering the ground
💨 Wind
- ·Measured gusts of 40 mph+; 58 mph is severe
- ·Damage: trees down, limbs bigger than your arm, roof or structure damage, power lines
- ·Say whether it was measured or estimated
🌊 Flooding
- ·Water over a road, especially moving water
- ·Creeks and rivers rising fast or out of their banks
- ·Rainfall of 1″ or more in an hour if you have a gauge
❄️ Winter
- ·Snowfall of 1″ an hour or more, and totals
- ·Freezing rain and ice accumulation on wires and trees
- ·Visibility under ¼ mile, blowing and drifting
🚫 Not this
- ·Lightning and thunder on their own
- ·Rain that isn't causing flooding
- ·Ordinary dark clouds, scud, or clouds that only look scary
- 1 · The net, if one is up
When the office activates SKYWARN, a net control on the local repeater takes reports in a set format and relays them straight to the forecaster. Listen first, check in when asked, keep it short: who, what, where, when.
- 2 · The office directly
No net running? Every office has a spotter line or online report form on its SKYWARN page - for you that’s NWS Johnston. Trained spotters get the number in class; anyone can use the form.
- 3 · Tell the room here
/report hail quarter · 71st & Memorial in #ia-wx puts it in front of everyone watching the state. It does not reach the NWS - do 1 or 2 for that.
Counties served by NWS Johnston · 51
IAC001 Adair
IAC003 Adams
IAC007 Appanoose
IAC009 Audubon
IAC013 Black Hawk
IAC015 Boone
IAC017 Bremer
IAC023 Butler
IAC025 Calhoun
IAC027 Carroll
IAC029 Cass
IAC033 Cerro Gordo
IAC039 Clarke
IAC047 Crawford
IAC049 Dallas
IAC051 Davis
IAC053 Decatur
IAC063 Emmet
IAC069 Franklin
IAC073 Greene
IAC075 Grundy
IAC077 Guthrie
IAC079 Hamilton
IAC081 Hancock
IAC083 Hardin
IAC091 Humboldt
IAC099 Jasper
IAC109 Kossuth
IAC117 Lucas
IAC121 Madison
IAC123 Mahaska
IAC125 Marion
IAC127 Marshall
IAC135 Monroe
IAC147 Palo Alto
IAC151 Pocahontas
IAC153 Polk
IAC157 Poweshiek
IAC159 Ringgold
IAC161 Sac
IAC169 Story
IAC171 Tama
IAC173 Taylor
IAC175 Union
IAC179 Wapello
IAC181 Warren
IAC185 Wayne
IAC187 Webster
IAC189 Winnebago
IAC195 Worth
IAC197 Wright