Alert archive / Illinois / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 13, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Mar 27, 1991, 12:51 PM CST for Clinton County, Iowa; Henry County, Whiteside County, Illinois. It was in force for 69 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Mar 27, 1991, 12:51 PM CST (18:51 UTC)
- Expired
- Mar 27, 1991, 2:00 PM CST
- In force
- 69 min
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties
Counties Clinton County, IA, Henry County, IL, Whiteside County, IL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 27, 1:30 PM CST | Hail 1.75 | Whiteside, IL |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 6.9 hours before the alert went out and 356 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
- 1516 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- -11 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 KMLI 271851
SVRMLI
IAC045-ILC073-195-272000-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOLINE IL
1251 PM CST WED MAR 27 1991
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 200 PM CST FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE EXTREME EAST PART OF IOWA
EASTERN CLINTON...
IN THE NORTHWEST PART OF ILLINOIS
NORTHERN HENRY...WHITESIDE...
AT 1245 PM CST...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS
OVER EASTERN CLINTON COUNTY IOWA AND WESTERN WHITESIDE AND NORTHERN
HENRY COUNTIES IN NORTHWEST ILLINOIS...35 MILES NORTHEAST OF MOLINE
THE THUNDERSTORMS WERE MOVING NORTHEAST AT 40 MILES AN HOUR.
SOME CITIES/TOWNS IN THE PATH OF THIS STORM INCLUDE... CLINTON...
STERLING/ROCK FALLS...MORRISON...GENESEO.
FOR YOUR PROTECTION GO TO A SAFE PLACE IMMEDIATELY. STAY INDOORS
AND AVOID WINDOWS. IF OUTDOORS...DO NOT STAND UNDER A TREE OR IN
OPEN AREAS SUCH AS A FIELD.
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER
SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES
WITH LITTLE OR NO WARNING...SO BE ON THE LOOKOUT AND BE
PREPARED TO MOVE TO A PMLACE OF SAFETY IF ONE IS SPOTTED.
IF TIME PERMITS...ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY
YOUR REPORT OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE.
ATTN ISP 7 AND 1
FOBERTWhat 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
Local storm report, Mar 27, 7:37 AM CST, 5 hours 14 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE MOLINE IL
7 35 AM CST WED MAR 27 1991
INFORMATION ON THUNDERSTORMS PASSING THROUGH MERCER COUNTY THIS
MORNING BETWEEN 5 00 AND 5 15 AM, RELAYED BY MERCER COUNTY POLICE.
0500-0515 CST MERCER COUNTY...FROM 4S TO 4E OF ALEDO
AT RESIDENCE 1..CORN CRIB KNOCKED AGAINST ANOTHER
BUILDING AND DESTROYED, GARAGE DOOR BLOWN OFF,
POWER POLES DOWN AND TWISTED.
AT RESIDENCE 2...METAL BUILDING TWISTED AND DESTROYED
FENCE DOWN.
AT RESIDENCE 3...SHED AND GARAGE DOOR DESTROYED,
POWER POLES DOWN
AT RESIDENCE 4...OLD BARN LEVELED
AT RESIDENCE 5...OUT BUILDING DESTROYED, PART OF
GARAGE BLOWN OFF, HOUSE DAMAGED.
AT RESIDENCE 6...BARN LEVELED, POWER POLES DOWN.
AT RESIDENCE 7...HOUSE SHOOK
AT RESIDENCE 8...TWO OUT BUILDINGS COMPLETELY DESTROYED
SIDING BLOWN OFF HOUSE, POWER POLES DOWN.
AT RESIDENCE 9...SHED DOWN
DICKEYSpecial weather statement, Mar 27, 10:23 AM CST, 2 hours 28 minutes before
IAC043-055-061-271730- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DUBUQUE IA 1023 AM CST WED MAR 27 1991 ...STRONG THUNDERSTORMS MOVING THROUGH NORTHERN TRI-STATE AREA... AT 1015 AM CST...RADAR INDICATED A LINE OF STRONG THUNDERSTORMS LOCATED IN DELAWARE COUNTY...NEAR MANCHESTER AND EXTENDED NORTHEAST INTO THE NORTHEAST PART OF DELAWARE COUNTY MOVING NORTH AROUND 40 MILES AN HOUR. THE STORMS WERE LOCATED 35 MILES WEST THROUGH NORTHWEST OF DUBUQUE. BRIEF HEAVY RAINS...STRONG WINDS AND SOME SMALL HAIL MAY OCCOMPANY THESE STORMS AS THEY PASS THROUGH THE NORTHEAST PART OF DELAWARE COUNTY...SOUTHEAST CLAYTON COUNTY AND THE NORTHWEST PART OF DUBUQUE COUNTY. SOME CITIES IN THE PATH OF THESE STORMS ARE...COLESBURG...LUXENBURG AND NEW VIENNA. PERSONS IN THESE AREAS SHOULD BE ALERT FOR THE STORMS AND IF THREATENING WEATHER APPROACHES...TAKE COVER IMMEDIATELY. KOWALSKI NNNN
Special weather statement, Mar 27, 10:46 AM CST, 2 hours 5 minutes before
IAZ008-WIZ018-271745- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DUBUQUE IA 1046 AM CST WED MAR 27 1991 ...STRONG STORMS CONTINUE OVER THE TRI-STATE AREA... AT 1043 AM CST...RADAR AND SURFACE REPORTS INDICATED SMALL HAIL...ALONG WITH HEAVY RAINS AND STRONG WINDS IN THE NORTHERN TIER OF THE TRI-STATE AREA. THE STRONGER STORMS WERE IN NORTHERN GRANT COUNTY IN SOUTHWEST WISCONSIN...30 MILES NORTH OF DUBUQUE AND WERE MOVING NORTH AT 40 MILES AN HOUR. AS THE STORMS MOVED THROUGH BLOOMINGTON AND BEETOWN...THEY PRODUCED HEAVY RAINS AND PEA SIZED HAIL. PERSONS IN THE NORTHERN PART OF THE TRI-STATE AREA SHOULD BE ALERT FOR THESE STORMS AND IF THREATENING WEATHER IS SIGHTED...TAKE COVER IMMEDIATELY. ANOTHER AREA OF THUNDERSTORMS WILL BE ENTERING THE SOUTHWEST PART OF JONES COUNTY...45 MILES SOUTHWEST OF DUBUQUE. THESE STORMS MAY ALSO PRODUCE SOME HAIL...STRONG WINDS AND HEAVY RAINS AS THEY MOVE NORTHEAST AT 40 MILES AN HOUR. KOWALSKI NNNN
Special weather statement, Mar 27, 11:27 AM CST, 1 hour 24 minutes before
IAZ008-WIZ018-ILZ001-271827- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DUBUQUE IA 1127 AM CST WED MAR 27 1991 ...STRONG THUNDERSTORMS STILL CONTINUE OVER THE TRI-STATE AREA... AT 1120 AM CST AREAS OF THUNDERSTORMS CONTINUED TO RUMBLE THROUGH CLAYTON...GRANT...DUBUQUE AND JONES COUNTIES IN THE TRI-STATE. THE STRONGEST THUNDERSTORM WAS LOCATED NEAR PATCH GROVE IN JONES COUNTIOWA OR 30 MILES SOUTHWEST OF DUBUQUE. THIS STORM COULD PRODUCE HEAVY RAIN...SMALL HAIL AND DANGEROUS LIGHTNING. THE STORM PRODUCED SMALL HAIL OVER ANAMOSA AND MARTELL IN JONES COUNTY. ANOTHER STRONG THUNDERSTORM WAS LOCATED 5 MILES SOUTH OF BOSCOBEL IN GRANT COUNY WISCONSIN OR 40 MILES NORTH OF DUBUQYUE. THIS STORM COULD PRODUCE HEAVY RAIN AND DANGEROUS LIGHTNING. PERSONS IN THE TRI-STATE SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND BE PREPARED TO TAKE COVER IF THREATENING WEATHER APPROACHES. HINNERS NNNN
Special weather statement, Mar 27, 11:37 AM CST, 1 hour 14 minutes before
IAZ008-WIZ018-271845- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DUBUQUE IA 1137 AM CST WED MAR 27 1991 ...STRONG THUNDERSTORMS STILL CONTINUE OVER THE TRI-STATE AREA... AT 1120 CST AM CST AREAS OF THUNDERSTORMS CONTINUED TO RUMBLE THROUGH CLAYTON...GRANT...DUBUQUE AND JONES COUNTIES IN THE TRI-STATE. THE STRONGEST THUNDERSTORM WAS LOCATED NEAR SCOTCH GROVE IN JONES COUNTY IOWA 30 MILES SOUTHWEST OF DUBUQUE. THIS STORM COULD PRODUCE HEAVY RAIN...SMALL HAIL AND DANGEROUS LIGHTNING. THE STORM PRODUCED SMALL HAIL OVER ANAMOSA AND MARTELL IN JONES COUNTY. ANOTHER STRONG THUNDERSTORM WAS LOCATED 5 MILES SOUTH OF BOSCOBEL IN GRANT COUNTY WISCONSIN OR 40 MILES NORTH OF DUBUQUEr. THIS STORM COULD PRODUCE HEAVY RAIN AND DANGEROUS LIGHTINING. PERSONS IN THE TRI-STATE SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND BE PREPARED TO TAKE COVER IF THREATENING WEATHER APPROACHES YOUR AREA. HINNERS NNNN
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 26, 10:15 PM CST | Severe Thunderstorm Warning | DVN | Des Moines, Henry, Lee | 30 min |
| Mar 27, 12:06 PM CST | Severe Thunderstorm Warning | DVN | Dubuque, Jackson | 39 min |
| Mar 27, 12:13 PM CST | Tornado Warning | DVN | Dubuque, Jackson | 32 min |
| Mar 27, 12:24 AM CST | Severe Thunderstorm Warning | DVN | Henry | 36 min |
| Mar 27, 5:48 AM CST | Severe Thunderstorm Warning | DVN | Henry | 27 min |
| Mar 27, 1:26 PM CST | Severe Thunderstorm Warning | DVN | Henry | 54 min |
| Mar 27, 1:26 PM CST | Severe Thunderstorm Warning | DVN | Mercer | 64 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1991Severe Thunderstorm Warnings in Iowa, 1991Every severe thunderstorm warning in 1991
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.