Alert archive / Iowa / Severe Thunderstorm Warnings in 1992
Severe Thunderstorm Warning 63, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jul 13, 1992, 3:11 PM CDT for Johnson County, Linn County, Iowa. It was in force for 49 min.
The area
The counties it named.
The facts
- Issued
- Jul 13, 1992, 3:11 PM CDT (20:11 UTC)
- Expired
- Jul 13, 1992, 4:00 PM CDT
- In force
- 49 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
Counties Johnson County, IA, Linn County, IA
The nearest sounding before it
Minneapolis, MN (KSTC), launched 12:00Z, 8.2 hours before the alert went out and 368 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1283 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 128 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 132012 SVRDSM IAC103-113-132100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 311 PM CDT MON JUL 13 1992 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 400 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATIONS... IN EAST CENTRAL IOWA ...EASTERN JOHNSON COUNTY...EASTERN LINN COUNTY AT 310 PM CDT RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS EXTENDING FROM 20 MILES NORTH OF CEDAR RAPIDS TO 30 MILES OF CEDAR RAPIDS. THIS LINE OF SEVERE STORMS WAS MOVING NORTHEAST AT 40 MPH. SOME CITIES THAT WILL BE AFFECTED BY THESE STORMS INCLUDE CENTRAL CITY...MOUNT VERNON...AND IOWA CITY. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY NSO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jul 13, 1:54 PM CDT, 1 hour 17 minutes before
IAZALL-131940- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 151 PM CDT MON JUL 13 1992 AT 136 PM CDT...A 20 MILE WIDE BAND OF THUNDERSTORMS PRODUCING VERY HEAVY RAIN EXTENDED FROM 30 MILES SOUTH OF DES MOINES...NEAR OSCEOLA NORTHEAST TO NEAR VINTON...OR 40 MILES SOUTH OF WATERLOO. VERY HEAVY RAIN AND DANGEROUS LIGHTNING IS LIKELY WITH THESE STORMS. THESE STORMS AS THEY PASSED THROUGH DES MOINES CAUSED CONSIDERABLE STREET FLOODING AS THEY DEPOSITED 11/4 INCHES IN AN HOUR AND A HALF. THESE STORMS WERE PART OF A LARGER AREA OF SHOWERS AND STORMS...40 MILES WIDE...THAT EXTENDED FROM 30 MILES SOUTHEAST OF OMAHA/COUNCIL BLUFFS NORTHEAST TO LANSING...IN THE NORTHEAST CORNER OF IOWA. A SECOND AREA OF SHOWERS AND SCATTERED THUNDERSTORMS...40 TO 60 MILES WIDE...EXTENDED FROM CARROLL NORTHEAST TO CRESCO...IN NORTHEAST IOWA. CARROLL IS 65 MILES NORTHWEST OF DES MOINES...WHILE CRESCO IS 50 MILES NORTH OrF WATERLOO. THE SHOWERS AND STORMS WERE MOVING EAST NORTHEAST AT 35 TO 40 MILES AN HOUR. BARLOW
Special weather statement, Jul 13, 2:53 PM CDT, 18 minutes before
IAZALL-132040- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 249 PM CDT MON JUL 13 1992 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THE SOUTHEAST THIRD OF IOWA UNTIL 9PM CDT... AT 231 PM CDT...A 25 MILE WIDE BAND OF VERY STRONG THUNDERSTORMS WAS LOCATED FROM LAMONI...IN SOUTH CENTRAL IOWA...NORTHEAST TO MANCHESTER OR 40 MILES EAST OF WATERLOO. MOST OF THE STORMS IN THIS AREA WILL PRODUCE VERY HEAVY RAIN AND FREQUENT DEADLY LIGHTNING. A FEW MAY PRODUCE SMALL HAIL. A FEW OF THESE STORMS WILL BE MOVING THROUGH THE CEDAR RAPIDS AREA BY 315 PM. THESE STORMS WILL CAUSE STREET FLOODING AND SMALL RIVER AND STREAMS WILL FILL UP QUICKLY. THESE STORMS WERE PART OF A MUCH LARGER AREA OF SHOWERS AND SCATTERED THUNDERSTORMS THAT EXTENDED FROM SOUTHWEST INTO NORTHEAST IOWA. THE SHOWERS AND STORMS WERE LOCATED ALONG AND ABOUT 70 MILES EITHER SIDE OF A LINE FROM BEDFORD...OR 70 MILES SOUTHWEST OF DES MOINES NORTHEAST TO DECORAH. THE SHOWERS AND STORMS WERE MOVING EAST NORTHEAST AT 35 TO 40 MILES AN HOUR. BARLOW
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 3:52 PM CDT | Severe Thunderstorm Warning | DMX | Iowa, Johnson | 53 min |
| Jul 13, 5:04 PM CDT | Severe Thunderstorm Warning | DMX | Washington | 26 min |
| Jul 13, 5:53 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose | 25 min |
| Jul 13, 6:14 PM CDT | Severe Thunderstorm Warning | DMX | Davis | 31 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1992Every severe thunderstorm warning in 1992
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.