Alert archive / Iowa / Severe Thunderstorm Warnings in 1995
Severe Thunderstorm Warning 111, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Sep 6, 1995, 7:07 PM CDT for Cerro Gordo County, Iowa. It was in force for 33 min.
The area
The counties it named.
The facts
- Issued
- Sep 6, 1995, 7:07 PM CDT (00:07 UTC)
- Expired
- Sep 6, 1995, 7:40 PM CDT
- In force
- 33 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Cerro Gordo County, IA
The radar
The Des Moines radar (KDMX), 155 km from the middle of the area, began a volume at 00:07 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 0.1 hours before the alert went out and 198 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
- 518 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 1019 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 151 m²/s²
- 0-3 km storm-relative helicity
- 220 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 2.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDSM 070005 RRA
SVRDSM
IAC033-070040-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
707 PM CDT WED SEP 6 1995
* SEVERE THUNDERSTORM WARNING FOR
CERRO GORDO COUNTY - NORTH CENTRAL IOWA
* UNTIL 740 PM CDT
* SOME TOWNS AFFECTED
MASON CITY
ROCKWELL
CLEAR LAKE
* AT 704 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES WEST OF
MASON CITY MOVING EAST AT 30 MPH.
* THE STORM WILL BE NEAR MASON CITY AT 710 PM.
THIS IS A DANGEROUS STORM. DO NOT GO OUTDOORS.
SMALLWhat 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, Sep 6, 2:13 PM CDT, 4 hours 54 minutes before
IAZALL-062115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DES MOINES IA 213 PM CDT WED SEP 6 1995 HAZARD...ISOLATED SEVERE THUNDERSTORMS WITH DAMAGING WINDS IN EXCESS OF 60 MPH WITH A FEW STORMS PRODUCING HAIL. AREA OF DEVELOPMENT...NORTH OF A LINE FROM SIOUX CITY THROUGH FORT DODGE TO MASON CITY. LATER THIS AFTERNOON...EAST OF I-35 AND NORTH OF A LINE FROM WATERLOO TO DUBUQUE. TIMING DETAILS...NORTHWEST IOWA DURING THE REMAINDER OF THE AFTERNOON. NORTHEAST IOWA LATE THIS AFTERNOON THROUGH THE EVENING HOURS. METEOROLOGICAL COMMENTS...THUNDERSTORMS CONTINUED TO DEVELOP ACROSS NORTHWEST IOWA THIS AFTERNOON IN ASSOCIATION WITH THE FIRST OF TWO COLD FRONTS THAT ARE EXPECTED TO MOVE ACROSS NORTHERN IOWA DURING THE NEXT 12 HOURS. OVER NORTHWEST IOWA...A WEAK SHEAR ENVIRONMENT COMBINED WITH MODERATE INSTABILITY AND CAPES UP TO 2000 J/KG WILL RESULT IN THUNDERSTORMS CAPABLE OF PRODUCING WIND GUSTS TO 50 MPH AND VERY HEAVY RAINS. RAINFALL TOTALS IN SOME LOCATIONS MAY EXCEED TWO INCHES. ACROSS NORTHEAST IOWA...THUNDERSTORMS MOVING EAST OUT OF THE NORTHWEST PORTION OF IOWA WILL LIKELY INTENSIFY AS THEY ENCOUNTER A MORE FAVORABLE WIND PROFILE AND BETTER LOW LEVEL CONVERGENCE. CAPES AROUND 3000 J/KG ARE ALREADY IN PLACE. AN INFLUX OF DRY AIR AROUND 850 MB MAY RESULT IN THE DEVELOPMENT OF DAMAGING DOWNBURSTS WITH ISOLATED STORMS. AS A RESULT...IT APPEARS THAT DAMAGING LOW LEVEL WINDS WILL BE THE MAIN SEVERE WEATHER THREAT THIS AFTERNOON. SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE SOUTHERN HALF OF THE STATE THROUGH THE EVENING HOURS. ALTHOUGH BRIEF HEAVY RAINS ARE POSSIBLE...SEVERE WEATHER IS NOT EXPECTED OVER SOUTHERN IOWA TODAY. PRECAUTIONS...THOUGH THE THREAT IS NOT AS STRONG AS PREVIOUSLY FORECAST SAFETY OFFICIALS SHOULD CONTINUE TO MONITOR THE SITUATION KEEPING ABREAST OF THE LATEST NWS STATEMENTS AND OUTLOOKS. KUBINA
Special weather statement, Sep 6, 2:16 PM CDT, 4 hours 51 minutes before
IAZALL-062115- IOWA SEVERE WEATHER OUTLOOK...CORRECTED NATIONAL WEATHER SERVICE DES MOINES IA 216 PM CDT WED SEP 6 1995 HAZARD...ISOLATED SEVERE THUNDERSTORMS WITH DAMAGING WINDS IN EXCESS OF 60 MPH WITH A FEW STORMS PRODUCING HAIL. AREA OF DEVELOPMENT...NORTH OF A LINE FROM SIOUX CITY THROUGH FORT DODGE TO MASON CITY. LATER THIS AFTERNOON...EAST OF I-35 AND NORTH OF A LINE FROM WATERLOO TO DUBUQUE. TIMING DETAILS...NORTHWEST IOWA DURING THE REMAINDER OF THE AFTERNOON. NORTHEAST IOWA LATE THIS AFTERNOON THROUGH THE EVENING HOURS. METEOROLOGICAL COMMENTS...THUNDERSTORMS CONTINUED TO DEVELOP ACROSS NORTHWEST IOWA THIS AFTERNOON IN ASSOCIATION WITH THE FIRST OF TWO COLD FRONTS THAT ARE EXPECTED TO MOVE ACROSS NORTHERN IOWA DURING THE NEXT 12 HOURS. OVER NORTHWEST IOWA...A WEAK SHEAR ENVIRONMENT COMBINED WITH MODERATE INSTABILITY AND CAPES UP TO 2000 J/KG WILL RESULT IN THUNDERSTORMS CAPABLE OF PRODUCING WIND GUSTS TO 50 MPH AND VERY HEAVY RAINS. RAINFALL TOTALS IN SOME LOCATIONS MAY EXCEED TWO INCHES. ACROSS NORTHEAST IOWA...THUNDERSTORMS MOVING EAST OUT OF THE NORTHWEST PORTION OF IOWA WILL LIKELY INTENSIFY AS THEY ENCOUNTER A MORE FAVORABLE WIND PROFILE AND BETTER LOW LEVEL CONVERGENCE. CAPES AROUND 3000 J/KG ARE ALREADY IN PLACE. AN INFLUX OF DRY AIR AROUND 850 MB MAY RESULT IN THE DEVELOPMENT OF DAMAGING DOWNBURSTS WITH ISOLATED STORMS. AS A RESULT...IT APPEARS THAT DAMAGING LOW LEVEL WINDS WILL BE THE MAIN SEVERE WEATHER THREAT THIS AFTERNOON. SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE SOUTHERN HALF OF THE STATE THROUGH THE EVENING HOURS. ALTHOUGH BRIEF HEAVY RAINS ARE POSSIBLE...SEVERE WEATHER IS NOT EXPECTED OVER SOUTHERN IOWA TODAY. PRECAUTIONS...THOUGH THE THREAT IS NOT AS STRONG AS PREVIOUSLY FORECAST SAFETY OFFICIALS SHOULD CONTINUE TO MONITOR THE SITUATION KEEPING ABREAST OF THE LATEST NWS STATEMENTS AND OUTLOOKS. KUBINA $$ ...CORRECTED TO CHANGE NAME OF PRODUCT...
Special weather statement, Sep 6, 2:17 PM CDT, 4 hours 50 minutes before
IAZALL-062115- IOWA SEVERE WEATHER OUTLOOK...CORRECTED NATIONAL WEATHER SERVICE DES MOINES IA 216 PM CDT WED SEP 6 1995 HAZARD...ISOLATED SEVERE THUNDERSTORMS WITH DAMAGING WINDS IN EXCESS OF 60 MPH WITH A FEW STORMS PRODUCING HAIL. AREA OF DEVELOPMENT...NORTH OF A LINE FROM SIOUX CITY THROUGH FORT DODGE TO MASON CITY. LATER THIS AFTERNOON...EAST OF I-35 AND NORTH OF A LINE FROM WATERLOO TO DUBUQUE. TIMING DETAILS...NORTHWEST IOWA DURING THE REMAINDER OF THE AFTERNOON. NORTHEAST IOWA LATE THIS AFTERNOON THROUGH THE EVENING HOURS. METEOROLOGICAL COMMENTS...THUNDERSTORMS CONTINUED TO DEVELOP ACROSS NORTHWEST IOWA THIS AFTERNOON IN ASSOCIATION WITH THE FIRST OF TWO COLD FRONTS THAT ARE EXPECTED TO MOVE ACROSS NORTHERN IOWA DURING THE NEXT 12 HOURS. OVER NORTHWEST IOWA...A WEAK SHEAR ENVIRONMENT COMBINED WITH MODERATE INSTABILITY AND CAPES UP TO 2000 J/KG WILL RESULT IN THUNDERSTORMS CAPABLE OF PRODUCING WIND GUSTS TO 50 MPH AND VERY HEAVY RAINS. RAINFALL TOTALS IN SOME LOCATIONS MAY EXCEED TWO INCHES. ACROSS NORTHEAST IOWA...THUNDERSTORMS MOVING EAST OUT OF THE NORTHWEST PORTION OF IOWA WILL LIKELY INTENSIFY AS THEY ENCOUNTER A MORE FAVORABLE WIND PROFILE AND BETTER LOW LEVEL CONVERGENCE. CAPES AROUND 3000 J/KG ARE ALREADY IN PLACE. AN INFLUX OF DRY AIR AROUND 850 MB MAY RESULT IN THE DEVELOPMENT OF DAMAGING DOWNBURSTS WITH ISOLATED STORMS. AS A RESULT...IT APPEARS THAT DAMAGING LOW LEVEL WINDS WILL BE THE MAIN SEVERE WEATHER THREAT THIS AFTERNOON. SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS THE SOUTHERN HALF OF THE STATE THROUGH THE EVENING HOURS. ALTHOUGH BRIEF HEAVY RAINS ARE POSSIBLE...SEVERE WEATHER IS NOT EXPECTED OVER SOUTHERN IOWA TODAY. PRECAUTIONS...THOUGH THE THREAT IS NOT AS STRONG AS PREVIOUSLY FORECAST SAFETY OFFICIALS SHOULD CONTINUE TO MONITOR THE SITUATION KEEPING ABREAST OF THE LATEST NWS STATEMENTS AND OUTLOOKS. KUBINA $$ ...CORRECTED TO CHANGE NAMtE OF PRODUCT...
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 7:53 PM CDT | Severe Thunderstorm Warning | DMX | Howard | 37 min |
| Sep 6, 8:18 PM CDT | Severe Thunderstorm Warning | DMX | Winneshiek | 27 min |
| Sep 6, 8:30 PM CDT | Severe Thunderstorm Warning | DMX | Howard | 15 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1995Every severe thunderstorm warning in 1995
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; radar from the NEXRAD Level II archive.